Accession Number : ADP006223

Title :   Experimental Investigation and Semi-Empirical Prediction of the Dynamic Response of a Low-Aspect-Ratio Trapezoidal Wing due to Flow Separation,

Corporate Author : DEUTSCHE AIRBUS G M B H BREMEN (GERMANY F R)

Personal Author(s) : Zingel, H.

Report Date : SEP 1990

Pagination or Media Count : 16

Abstract : The buffet response of a low-aspect-ratio trapezoidal half-wing model was measured in the low speed wind tunnel of the DLR-Research Center in Goettingen at different model natural frequencies of pitch and roll both separately and coupled and at different angles of incidence up to 40 degrees. On the basis of linear aeroelastic equations of motion and measured structural dynamic and unsteady aerodynamic input data, the buffet response was calculated and compared with the measurement. The comparison shows a satisfactory coincidence. Consequently the adopted way for the semi-empirical calculation of the buffet response proves to be practicable.

Descriptors :   *SWEPT WINGS, *BUFFETING, FLOW SEPARATION, STRUCTURAL RESPONSE, DYNAMIC RESPONSE, EQUATIONS OF MOTION, RESONANT FREQUENCY, ANGLE OF ATTACK, WIND TUNNEL TESTS, MATHEMATICAL PREDICTION, WEST GERMANY.

Subject Categories : Aerodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE